CN210458755U

CN210458755U - Novel roll shell type flow box

Info

Publication number: CN210458755U
Application number: CN201921344541.0U
Authority: CN
Inventors: 侯顺利; 孔祥玺; 门鑫; 杨恒
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-05-05
Anticipated expiration: 2029-08-19

Abstract

A novel roll shell type flow box comprises a balance chamber at a pulp flow inlet, wherein the balance chamber is connected with a groove roller, the groove roller is connected with a sizing device, an inclined overflow port is also arranged between the inlet end and the outlet end of the groove roller, an acute angle included angle formed by the inclined overflow port and the groove roller is 30-60 degrees, pulp flow in the groove roller is divided at the inclined overflow port inlet, and the inclined overflow port is connected with an overflow pressure regulating chamber; paper pulp enters the inside of the groove roller from the equalizing chamber, the groove roller rotating at a high speed drives pulp flow to move anticlockwise, when the pulp passes through an overflow port, a small amount of pulp can enter the overflow pressure regulating chamber upwards, a part of the rest of the pulp flows out of the pulp flowing box from the sizing device under the action of pressure difference, and the other part of the pulp continues to move along with the groove roller and is mixed with the pulp flow from the equalizing chamber to carry out next circulation; the utility model has the advantages of easy operation, low in production cost and work efficiency are high.

Description

Novel roll shell type flow box

Technical Field

The utility model relates to a head box among the papermaking equipment, concretely relates to novel roll shell formula head box.

Background

The traditional flow box used in the papermaking process consists of a pulp distributor, a rectifying part and a paper material net surfing device, and has the defects of large turbulence size, small turbulence intensity, large transverse flow, unstable pulp flow, incapability of effectively using dilution water to adjust the quantitative difference of the cross width of paper and the like; the roll shell type head box can improve the uniformity of paper and reduce the cross-width quantitative difference of the paper, thereby obtaining better paper forming quality, and has the characteristics of adapting to the change of the pulp feeding amount and adjusting the turbulence intensity on line; at present, an inlet of an overflow pressure regulating chamber is in a right angle, and the functions of regulating the pressure in the tank, absorbing pressure pulses and eliminating bubbles are achieved; but simultaneously the high-speed rotatory ditch groove roller can drive inside thick liquid and flow the motion, produces great negative pressure at overflow surge-chamber right angle import department, causes the inside evacuation equipment that needs of overflow surge-chamber, increases cost and the operation degree of difficulty.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a novel roller shell type head box can change the overflow surge-chamber import direction of the roller shell type head box, the pressure inside the overflow surge-chamber is changed into positive pressure by negative pressure when the roller shell type head box is operated, no vacuum pumping equipment is needed, and the novel roller shell type head box has the advantages of simple operation, low production cost and high working efficiency.

In order to realize the purpose, the utility model discloses a technical scheme does:

the utility model provides a novel roll shell formula head box, includes equalizing chamber 5 of thick liquid import department, equalizing chamber 5's exit end is connected with the entrance point of ditch groove roller 2, the exit end of ditch groove roller 2 is connected with the entrance point of sizing apparatus 1, still be provided with the entrance point of slope overflow mouth 3 between the entrance point of ditch groove roller 2 and the exit end, the exit end of slope overflow mouth 3 is connected with the entrance point of overflow surge-chamber 4.

In the grooved roll 2, the pulp flow is split at the inlet of the inclined overflow 3.

The acute angle included angle formed by the inclined overflow port 3 and the groove roller 2 is 30-60 degrees.

The utility model has the advantages that the inclined overflow port 3 is arranged, so that the flow of the slurry entering the overflow pressure regulating chamber 4 is increased when the slurry flows through the inclined overflow port 3, the kinetic energy of the slurry entering the overflow pressure regulating chamber 4 is converted into static pressure energy, the internal pressure of the overflow pressure regulating chamber 4 is increased, the high-speed flow of the slurry is prevented from generating higher negative pressure at the overflow port, and the vacuum pumping equipment is not needed; through setting up the suitable import angle of slope overflow mouth 3, make the relation between overflow surge-chamber 4 pressure and the starching speed be monotonic quadratic function, can realize adjusting the mesh of whitewashing speed through overflow surge-chamber 4 pressure, have easy operation, low in production cost and the high advantage of work efficiency.

Drawings

Fig. 1 is a schematic view of the structure and the slurry flow channel of the present invention.

Fig. 2 is a partial enlarged view of the overflow surge chamber of the present invention.

In the figure: 1. a sizing device; 2. a grooved roll; 3. inclining the overflow port; 4. an overflow surge chamber; 5. and an equalizing chamber.

Detailed Description

The structure and operation of the present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1 and 2, a novel roll shell type headbox comprises a balancing chamber 5 at a pulp flow inlet, wherein an outlet end of the balancing chamber 5 is connected with an inlet end of a grooved roll 2, an outlet end of the grooved roll 2 is connected with an inlet end of a sizing device 1, an inlet end of an inclined overflow port 3 is further arranged between the inlet end and the outlet end of the grooved roll 2, and an outlet end of the inclined overflow port 3 is connected with an inlet end of an overflow pressure regulating chamber 4.

The utility model discloses a theory of operation does: paper pulp enters the inside of the grooved roller 2 from the equalizing chamber 5 (a pulp flow inlet), the grooved roller 2 rotating at a high speed drives pulp flow to move anticlockwise, when the pulp passes through the overflow port 3, a small amount of pulp can enter the overflow pressure regulating chamber 4 upwards, one part of the rest most of pulp flows out of the pulp flowing box from the sizing device 1 (namely the pulp flow outlet) under the action of pressure difference, and the other part of the rest pulp continuously moves along with the grooved roller 2 and is mixed with the pulp flow from the equalizing chamber 5 to carry out next circulation.

The above embodiments are only used for illustrating the present invention, and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. A new roll shell headbox, comprising an equalizing chamber (5) at the inlet of the stock flow, characterized in that: the outlet end of the equalizing chamber (5) is connected with the inlet end of the groove roller (2), the outlet end of the groove roller (2) is connected with the inlet end of the sizing device (1), the inlet end of an inclined overflow port (3) is further arranged between the inlet end and the outlet end of the groove roller (2), and the outlet end of the inclined overflow port (3) is connected with the inlet end of the overflow pressure regulating chamber (4).

2. The new roll shell headbox according to claim 1, characterized by: in the groove roller (2), the pulp flow is divided at the inlet of the inclined overflow port (3).

3. The new roll shell headbox according to claim 1, characterized by: the inclined overflow port (3) and the groove roller (2) form an acute angle of 30-60 degrees.